Stuffing-box



(No Model.)

A. H. CLARK.

'SHIPPING BOX. No. 344,349. Patented June 29, 1886.

-'UNITED STATESv PATENT OEEICE;A

ALEXANDER H. CLARK, OF FOND DU LAO, WISCONSIN.

sTUFl-ING-Box.

SPEGIFICATION forming part of Letters Patent No. `344,349, dated .T une 29, 1886.

Application filed April 23, 1886. Serial No. 199,869. (No model.)

Io tains to make and use the same.'y

My invention relates to'an improvement in stuing-boxes.

On March 9,1S86,Letters Patent N o. 337 ,663, entitled stuiiing-boxes, were granted me,

in which a longitudinally-movable packingcylinder was shown and described, having grooves leading from its end toward the cylinder to slots in its periphery for conducting steam-pressure to the outside of the packing 2o Within the packing-cylinder, for holding the packing in snug contact with the piston-rod.

Theobject of my present invention is to provide a packing-cylinder,in connection with a stufing-box and gland, which will prevent the escape of steam between its periphery and the interior surface of the gland, and which will admit steam-pressure between rings of packinglocated,respectively,on the periphery of the packing-cylinder and around the piston- 3o rod passing through the packing cylinder,

thereby causing the pressure of steam within the cylinder to automatically form a steamtight joint around the piston-rod at the cylinder-head.

With these ends in view my invention con sists in certain features of construction and combinations of parts, as will be hereinafter described, and pointed out in the claims.

In the accompanying drawings, Figure lis 4o a longitudinal section through the center of the piston-rod, and Fig. 2 is a detached view of the packing-cylinder.

A represents the cylinder-head, having an outwardlyprojecting stuthng-box, C; or the cylinder-head might be chambered out to answer the purpose of the box C.

B represents the gland, adapted to slide within the bore of the box C, and provided with atlange, c. Draw-bolts D extend through 5o the flange c, and through a corresponding ilange, b, on the end of the gland, by means of which the gland B is forced longitudinally within the box C; or the gland B might be screw-threaded and engage a female thread within the box C.V Y A The packing-cylinder E is preferably formed in two half-sections, and is adapted .to slide longitudinally within the-bore of the box C, and its end toward thecylinder is adapted to Vrest iny snug contact with an"- annular' seat, b', within the lbox C. The contact of the end of the'cylinderE with the"` seat b is assured by the pressure of the end of the gland thereon,v

vided with an annular recess, e', preferably corresponding to the interior recess, e.

The portion of the cylinder-shell which lies between the recesses eand e isprovided with a series of elongated slots, G, extending through the shell from recess to recess, and a series of perforatious, H, extend through from the inner end of the cylinder Eto the ends of the slots G. j l A series of channels, I, are formed in the end of the packing cylinder, leading from the ends of the perfor-ations H to the central bore, gradually increasing in size as they approach the bore.

Rings of packing K and 7c, either of atextile or metallic nature, are secured in the recesses e and e', respectively.

When the end ot' the packing-cylinder is pressed in snug contact with its seat,the steam which escapes past the piston-rod in the cylinder-head is prevented' from passing outwardly onto the periphery of the packingcylinder to any great extent, and is conducted along the channels l, through the perforations H,into the slots G between the two rings of packing, where its pressure is exerted outwardly on the packing Kand inwardly on the packing lc, rendering the joint between the packing-cylinder and stuihng-box steam-tight, and also holding the packing in snug contact with the piston-rod.

It is evident that slight changes might be IOO resorted to in the form and arrangement of the several parts described without departing from the spirit and scope of my invention; hence I do not wish to limit myself strictly to the construction herein set forth; but

Having fully described my invention, what I claim as new,and desire to secure by Letters Patent, is

1. A packing-cylinder forastuftingbox,the said packing-cylinder having an internal and external ring of packing, and a series of channels adapted to conduct steam between the two rings of packing, substantially as set forth.

2. The combination, with astuffing-box and gland, of a packing-cylinder adapted to rest in snug contact with an annular seat in the stuffing-box, the said packing-cylinder having an inner and outer ring of packing and a series of channels leading from the edge of the piston-rod bore to the space between the rings of packing, substantially `as set forth.

3. In a stuffing-box, apackingcylinder prol vided with inner and outer recesses adapted to receive packing, a series of openings connecting the two recesses,and steam-conduits leading from the said openings to the edge of the piston-rod bore on the inner end of the packing-cylinder, substantially as set forth.

4. In a stuffing-box, a packing-cylinder provided on its inner end with a series of perforations communicating with openings in lthe shell of the cylinder and channels leading from the ends of the perforations to the edge of the bore, the said channels gradually increasing in size as they approach the bore, substantially as set forth.

5. The combination, with a stuffing-box, a packing-cylinder having external and internal rings of packing, and a series of channels adapted to conduct steam between the two rings, of packing` of a gland and devices for forcing in the gland into contact with the packi ng-cylinder, substantallyas set forth.

In testimony whereof I have signed this specification in the presence of two subscrb- 45,

ing witnesses.

ALEXANDER H. CLARK.

Witnesses:

JAMES T. GREENE, JAooB CLARK. 

